Difference between Diacritical Mark and Umlaut

DIACRITICAL MARK vs UMLAUT: NOUN

A symbol in writing used with a letter to indicate a different pronunciation, stress, tone, or meaning, also called "tone marks" when used to indicate tones, e.g. in Vietnamese or pinyin (romanised Mandarin Chinese).
A mark added to a letter to indicate a special pronunciation

The diacritical mark ( ¨ ) placed over a vowel, usually when it indicates such assimilation.
A vowel so assimilated.
The umlaut process (as above) that occurred historically in Germanic languages whereby back vowels became front vowels when followed by syllable containing a front vocoid (e.g. Germanic lūsi > Old English līs(i) > Modern English lice).
An assimilatory process whereby a vowel is pronounced more like a following vocoid that is separated by one or more consonants.
The euphonic modification of a root vowel sound by the influence of a, u, or especially i, in the syllable which formerly followed.
In philology, the German name, invented by Grimm, for a vowel-change in the Germanic languages, brought about by the influence of a vowel in the succeeding syllable: namely, of the vowel i, modifying the preceding vowel in the direction of e or i, and of the vowel u, modifying the preceding vowel toward a or u.
The diacritic mark (¨) placed over a vowel to indicate an umlaut, especially in German.
A vowel sound changed in this manner.
A change in a vowel sound caused by partial assimilation especially to a vowel or semivowel occurring in the following syllable.
A diacritical mark (two dots) placed over a vowel in German to indicate a change in sound

In philology, to form with the umlaut, as a form; also, to affect or modify by umlaut, as a sound.

Metagraphy, Ecthlipsis, Pronunciation, Imparisyllabic, Orthographer, Dieresis, Acute accent, Transliteration, Punctuation, Grave accent, Iotacism, Pasigraphy, Metaphony, Vocoid, Diacritic

Lish, Weiss, Wann, Nein, Meno, Pomme, Semplice, Diphthong, Bitte, Tildes, Danke, Meine, Metaphony, Dieresis, Diaeresis

Metagraphy, Ecthlipsis, Pronunciation, Imparisyllabic, Orthographer, Dieresis, Acute accent, Transliteration, Punctuation, Grave accent, Iotacism, Pasigraphy, Metaphony, Vocoid, Diacritic

Triste, Deutsch, Ampersand, Acte, Lish, Weiss, Meno, Pomme, Diphthong, Bitte, Tildes, Danke, Meine, Metaphony, Dieresis

Whenever a combining diacritical mark is used in a document, the font in use should be tested to confirm that it is rendered acceptably.
It is an accent or other diacritical mark that is added to the previous character.

I am deliciously seeing a umlaut and goldenseal to help me with the convent.
In cases where an umlaut is impossible to use, it should be spelled Osnabrueck.
We have partnered with a company called umlaut on the development of this app.
Toth libido Any questions fiscal to: drug abuse,recovery and gutenberg umlaut.
English uses the umlaut also, just not a diacritic to mark it.
Why is there an umlaut over the second o in motorhead?
Sometimes, the plural or feminine form will feature an umlaut.
For example, characters with an umlaut are not allowed.
For example, produces the character with an umlaut.
Unusual umlaut designs are sometimes also created for graphic design purposes, such as to fit an umlaut into tightly spaced lines of text.